Malachai

He knows, as surely as a bird knows it can fly; that violence flows through his veins and his very being was tainted with it. It would take less than a thought to destroy the human in front of him with a show of power. But he doesn't. Because he is not only the Malachai, but also a human and both sides had just as much claim over his being.

-Malachai is not a name, but a title. A title that carries both a curse and power.
-All Malachai come into full power with the death of their sire. Generally speaking, if the son kills his father he is well capable of defending himself; if not, he dies to the father.
-Originally created to bring down the Sephirii, and often compared to an army of fallen angels. There used to be more than one Malachai, but both armies were all killed besides one on either side after an unfortunate event. The last Sephirii; traitor to his own people, was to be forever enslaved and shamed for his actions, while the last Malachai was left alive to be his counter if he ever did escape.